The BAT-FR03/EGL is a modular DC backup power system from Energizer. It is an expandable, flexible, reliable and efficient system that provides an uninterruptible power supply for critical loads. The system components are easy to install, manage and maintain due to their modular design. The system Includes a main module, a battery module, an external power source, and an optional ethernet adapter. The main module provides the power back-up function in the event of an AC power supply failure. The battery module provides energy storage while the external power source provides power when there is an AC power outage. Finally, the optional Ethernet adapter allows remote monitoring and control of the system.